Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 11:22:37 AM (PDT) on Sunday, October 4, 2026.
The magnitude 1.9 event occurred 10 km (6 miles) SE of Chester, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.9 - duration magnitude (Md) |
| Time | Sunday, October 4, 2026 at 11:22:37 AM (PDT) Sunday, October 4, 2026 at 18:22:37 (UTC) |
| Distance from |
Chester, CA - 10 km (6 miles) SE (142 degrees) Greenville, CA - 21 km (13 miles) WNW (301 degrees) Quincy, CA - 38 km (24 miles) NNW (332 degrees) East Quincy, CA - 40 km (25 miles) NNW (327 degrees) Susanville, CA - 48 km (30 miles) WSW (245 degrees) |
| Coordinates | 40 deg. 14.1 min. N (40.236N), 121 deg. 9.6 min. W (121.160W) |
| Depth | 6.86 km (4.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=9, Nph=9, Dmin=13.0 km, Rmss=0.14 sec, Erho=0.53 km, Erzz=1.97000003 km, Gp=91 degrees |
| Event ID# | nc75444306 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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